/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-min-max-1.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 08:46:46,632 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 08:46:46,704 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 08:46:46,712 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 08:46:46,713 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 08:46:46,713 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 08:46:46,713 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 08:46:46,748 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 08:46:46,748 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 08:46:46,752 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 08:46:46,752 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 08:46:46,752 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 08:46:46,753 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 08:46:46,754 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 08:46:46,754 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 08:46:46,755 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 08:46:46,755 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 08:46:46,755 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 08:46:46,755 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 08:46:46,756 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 08:46:46,756 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 08:46:46,756 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 08:46:46,756 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 08:46:46,757 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 08:46:46,757 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 08:46:46,757 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 08:46:46,757 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 08:46:46,758 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 08:46:46,758 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 08:46:46,758 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 08:46:46,759 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:46:46,759 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 08:46:46,759 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 08:46:46,759 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 08:46:46,760 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 08:46:46,760 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 08:46:46,760 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 08:46:46,760 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 08:46:46,760 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 08:46:46,760 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 08:46:46,760 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 08:46:46,761 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 08:46:47,028 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 08:46:47,055 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 08:46:47,058 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 08:46:47,059 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 08:46:47,059 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 08:46:47,060 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-min-max-1.wvr_bound2.c [2023-08-04 08:46:48,269 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 08:46:48,448 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 08:46:48,448 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-min-max-1.wvr_bound2.c [2023-08-04 08:46:48,455 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4918ca33a/11e78ed04ceb4769949056ba371c6acd/FLAG3603e1629 [2023-08-04 08:46:48,470 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4918ca33a/11e78ed04ceb4769949056ba371c6acd [2023-08-04 08:46:48,473 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 08:46:48,474 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 08:46:48,475 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 08:46:48,475 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 08:46:48,479 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 08:46:48,479 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:46:48" (1/1) ... [2023-08-04 08:46:48,480 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17199fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:46:48, skipping insertion in model container [2023-08-04 08:46:48,480 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:46:48" (1/1) ... [2023-08-04 08:46:48,512 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 08:46:48,671 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-min-max-1.wvr_bound2.c[3300,3313] [2023-08-04 08:46:48,676 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:46:48,685 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 08:46:48,709 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-min-max-1.wvr_bound2.c[3300,3313] [2023-08-04 08:46:48,714 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:46:48,721 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 08:46:48,722 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 08:46:48,728 INFO L206 MainTranslator]: Completed translation [2023-08-04 08:46:48,728 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:46:48 WrapperNode [2023-08-04 08:46:48,728 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 08:46:48,731 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 08:46:48,732 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 08:46:48,732 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 08:46:48,738 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:46:48" (1/1) ... [2023-08-04 08:46:48,745 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:46:48" (1/1) ... [2023-08-04 08:46:48,766 INFO L138 Inliner]: procedures = 25, calls = 53, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 177 [2023-08-04 08:46:48,766 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 08:46:48,767 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 08:46:48,767 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 08:46:48,767 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 08:46:48,775 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:46:48" (1/1) ... [2023-08-04 08:46:48,775 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:46:48" (1/1) ... [2023-08-04 08:46:48,779 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:46:48" (1/1) ... [2023-08-04 08:46:48,779 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:46:48" (1/1) ... [2023-08-04 08:46:48,786 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:46:48" (1/1) ... [2023-08-04 08:46:48,789 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:46:48" (1/1) ... [2023-08-04 08:46:48,791 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:46:48" (1/1) ... [2023-08-04 08:46:48,792 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:46:48" (1/1) ... [2023-08-04 08:46:48,795 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 08:46:48,796 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 08:46:48,796 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 08:46:48,796 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 08:46:48,797 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:46:48" (1/1) ... [2023-08-04 08:46:48,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:46:48,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:46:48,827 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 08:46:48,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 08:46:48,865 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 08:46:48,866 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 08:46:48,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 08:46:48,866 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 08:46:48,866 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 08:46:48,867 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 08:46:48,867 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 08:46:48,867 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 08:46:48,867 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 08:46:48,869 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 08:46:48,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 08:46:48,869 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 08:46:48,870 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 08:46:48,870 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 08:46:48,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 08:46:48,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 08:46:48,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 08:46:48,871 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 08:46:48,960 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 08:46:48,961 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 08:46:49,320 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 08:46:49,405 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 08:46:49,405 INFO L302 CfgBuilder]: Removed 9 assume(true) statements. [2023-08-04 08:46:49,407 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:46:49 BoogieIcfgContainer [2023-08-04 08:46:49,408 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 08:46:49,410 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 08:46:49,410 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 08:46:49,414 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 08:46:49,414 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 08:46:48" (1/3) ... [2023-08-04 08:46:49,415 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d917dcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:46:49, skipping insertion in model container [2023-08-04 08:46:49,416 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:46:48" (2/3) ... [2023-08-04 08:46:49,416 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d917dcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:46:49, skipping insertion in model container [2023-08-04 08:46:49,416 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:46:49" (3/3) ... [2023-08-04 08:46:49,417 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_parallel-min-max-1.wvr_bound2.c [2023-08-04 08:46:49,425 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 08:46:49,433 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 08:46:49,434 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 08:46:49,434 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 08:46:49,522 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 08:46:49,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 197 places, 217 transitions, 476 flow [2023-08-04 08:46:49,762 INFO L124 PetriNetUnfolderBase]: 95/666 cut-off events. [2023-08-04 08:46:49,762 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 08:46:49,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 727 conditions, 666 events. 95/666 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3103 event pairs, 0 based on Foata normal form. 0/561 useless extension candidates. Maximal degree in co-relation 383. Up to 16 conditions per place. [2023-08-04 08:46:49,771 INFO L82 GeneralOperation]: Start removeDead. Operand has 197 places, 217 transitions, 476 flow [2023-08-04 08:46:49,781 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 197 places, 217 transitions, 476 flow [2023-08-04 08:46:49,785 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:46:49,796 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 197 places, 217 transitions, 476 flow [2023-08-04 08:46:49,799 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 197 places, 217 transitions, 476 flow [2023-08-04 08:46:49,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 197 places, 217 transitions, 476 flow [2023-08-04 08:46:49,883 INFO L124 PetriNetUnfolderBase]: 95/666 cut-off events. [2023-08-04 08:46:49,884 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 08:46:49,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 727 conditions, 666 events. 95/666 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3103 event pairs, 0 based on Foata normal form. 0/561 useless extension candidates. Maximal degree in co-relation 383. Up to 16 conditions per place. [2023-08-04 08:46:49,897 INFO L119 LiptonReduction]: Number of co-enabled transitions 4842 [2023-08-04 08:46:56,239 INFO L134 LiptonReduction]: Checked pairs total: 9825 [2023-08-04 08:46:56,239 INFO L136 LiptonReduction]: Total number of compositions: 204 [2023-08-04 08:46:56,252 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:46:56,258 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7c6784a8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:46:56,258 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:46:56,263 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:46:56,263 INFO L124 PetriNetUnfolderBase]: 3/35 cut-off events. [2023-08-04 08:46:56,263 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:46:56,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:46:56,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:46:56,264 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:46:56,268 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:46:56,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1551588329, now seen corresponding path program 1 times [2023-08-04 08:46:56,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:46:56,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980716966] [2023-08-04 08:46:56,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:46:56,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:46:56,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:46:56,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:46:56,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:46:56,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980716966] [2023-08-04 08:46:56,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980716966] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:46:56,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:46:56,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:46:56,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760507177] [2023-08-04 08:46:56,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:46:56,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:46:56,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:46:56,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:46:56,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:46:56,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 421 [2023-08-04 08:46:56,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 49 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:46:56,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:46:56,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 421 [2023-08-04 08:46:56,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:46:56,919 INFO L124 PetriNetUnfolderBase]: 1790/2844 cut-off events. [2023-08-04 08:46:56,919 INFO L125 PetriNetUnfolderBase]: For 207/207 co-relation queries the response was YES. [2023-08-04 08:46:56,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5779 conditions, 2844 events. 1790/2844 cut-off events. For 207/207 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 13703 event pairs, 740 based on Foata normal form. 0/2181 useless extension candidates. Maximal degree in co-relation 4892. Up to 2669 conditions per place. [2023-08-04 08:46:56,935 INFO L140 encePairwiseOnDemand]: 417/421 looper letters, 44 selfloop transitions, 2 changer transitions 4/53 dead transitions. [2023-08-04 08:46:56,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 53 transitions, 242 flow [2023-08-04 08:46:56,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:46:56,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:46:56,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 595 transitions. [2023-08-04 08:46:56,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47110055423594616 [2023-08-04 08:46:56,949 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 595 transitions. [2023-08-04 08:46:56,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 595 transitions. [2023-08-04 08:46:56,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:46:56,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 595 transitions. [2023-08-04 08:46:56,958 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 198.33333333333334) internal successors, (595), 3 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:46:56,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 421.0) internal successors, (1684), 4 states have internal predecessors, (1684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:46:56,964 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 421.0) internal successors, (1684), 4 states have internal predecessors, (1684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:46:56,966 INFO L175 Difference]: Start difference. First operand has 44 places, 49 transitions, 140 flow. Second operand 3 states and 595 transitions. [2023-08-04 08:46:56,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 53 transitions, 242 flow [2023-08-04 08:46:56,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 242 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:46:56,972 INFO L231 Difference]: Finished difference. Result has 46 places, 45 transitions, 134 flow [2023-08-04 08:46:56,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=421, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=46, PETRI_TRANSITIONS=45} [2023-08-04 08:46:56,976 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 2 predicate places. [2023-08-04 08:46:56,977 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 45 transitions, 134 flow [2023-08-04 08:46:56,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:46:56,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:46:56,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:46:56,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 08:46:56,978 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:46:56,979 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:46:56,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1962064046, now seen corresponding path program 1 times [2023-08-04 08:46:56,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:46:56,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286408525] [2023-08-04 08:46:56,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:46:56,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:46:57,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:46:57,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:46:57,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:46:57,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286408525] [2023-08-04 08:46:57,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286408525] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:46:57,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422847031] [2023-08-04 08:46:57,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:46:57,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:46:57,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:46:57,069 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:46:57,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 08:46:57,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:46:57,160 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:46:57,164 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:46:57,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:46:57,178 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:46:57,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422847031] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:46:57,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:46:57,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:46:57,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351510028] [2023-08-04 08:46:57,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:46:57,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:46:57,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:46:57,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:46:57,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:46:57,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 421 [2023-08-04 08:46:57,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 45 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:46:57,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:46:57,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 421 [2023-08-04 08:46:57,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:46:57,486 INFO L124 PetriNetUnfolderBase]: 1738/2720 cut-off events. [2023-08-04 08:46:57,486 INFO L125 PetriNetUnfolderBase]: For 171/171 co-relation queries the response was YES. [2023-08-04 08:46:57,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5538 conditions, 2720 events. 1738/2720 cut-off events. For 171/171 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 12479 event pairs, 741 based on Foata normal form. 0/2086 useless extension candidates. Maximal degree in co-relation 4656. Up to 2540 conditions per place. [2023-08-04 08:46:57,505 INFO L140 encePairwiseOnDemand]: 418/421 looper letters, 48 selfloop transitions, 2 changer transitions 1/54 dead transitions. [2023-08-04 08:46:57,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 54 transitions, 254 flow [2023-08-04 08:46:57,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:46:57,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:46:57,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 598 transitions. [2023-08-04 08:46:57,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4734758511480602 [2023-08-04 08:46:57,510 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 598 transitions. [2023-08-04 08:46:57,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 598 transitions. [2023-08-04 08:46:57,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:46:57,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 598 transitions. [2023-08-04 08:46:57,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 199.33333333333334) internal successors, (598), 3 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:46:57,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 421.0) internal successors, (1684), 4 states have internal predecessors, (1684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:46:57,516 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 421.0) internal successors, (1684), 4 states have internal predecessors, (1684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:46:57,517 INFO L175 Difference]: Start difference. First operand has 46 places, 45 transitions, 134 flow. Second operand 3 states and 598 transitions. [2023-08-04 08:46:57,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 54 transitions, 254 flow [2023-08-04 08:46:57,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 54 transitions, 238 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-04 08:46:57,521 INFO L231 Difference]: Finished difference. Result has 41 places, 45 transitions, 126 flow [2023-08-04 08:46:57,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=421, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=41, PETRI_TRANSITIONS=45} [2023-08-04 08:46:57,522 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -3 predicate places. [2023-08-04 08:46:57,522 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 45 transitions, 126 flow [2023-08-04 08:46:57,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:46:57,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:46:57,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:46:57,535 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 08:46:57,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:46:57,729 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:46:57,730 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:46:57,730 INFO L85 PathProgramCache]: Analyzing trace with hash -336862892, now seen corresponding path program 1 times [2023-08-04 08:46:57,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:46:57,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888845586] [2023-08-04 08:46:57,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:46:57,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:46:57,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:46:57,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:46:57,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:46:57,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888845586] [2023-08-04 08:46:57,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888845586] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:46:57,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971977231] [2023-08-04 08:46:57,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:46:57,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:46:57,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:46:57,821 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:46:57,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 08:46:57,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:46:57,899 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:46:57,900 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:46:57,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:46:57,907 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:46:57,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971977231] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:46:57,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:46:57,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:46:57,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608501547] [2023-08-04 08:46:57,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:46:57,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:46:57,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:46:57,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:46:57,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:46:57,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 421 [2023-08-04 08:46:57,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 45 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:46:57,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:46:57,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 421 [2023-08-04 08:46:57,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:46:58,167 INFO L124 PetriNetUnfolderBase]: 1722/2704 cut-off events. [2023-08-04 08:46:58,168 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2023-08-04 08:46:58,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5533 conditions, 2704 events. 1722/2704 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 11775 event pairs, 936 based on Foata normal form. 0/2102 useless extension candidates. Maximal degree in co-relation 4306. Up to 2384 conditions per place. [2023-08-04 08:46:58,182 INFO L140 encePairwiseOnDemand]: 418/421 looper letters, 49 selfloop transitions, 2 changer transitions 1/55 dead transitions. [2023-08-04 08:46:58,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 55 transitions, 250 flow [2023-08-04 08:46:58,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:46:58,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:46:58,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 599 transitions. [2023-08-04 08:46:58,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4742676167854315 [2023-08-04 08:46:58,184 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 599 transitions. [2023-08-04 08:46:58,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 599 transitions. [2023-08-04 08:46:58,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:46:58,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 599 transitions. [2023-08-04 08:46:58,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:46:58,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 421.0) internal successors, (1684), 4 states have internal predecessors, (1684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:46:58,189 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 421.0) internal successors, (1684), 4 states have internal predecessors, (1684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:46:58,189 INFO L175 Difference]: Start difference. First operand has 41 places, 45 transitions, 126 flow. Second operand 3 states and 599 transitions. [2023-08-04 08:46:58,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 55 transitions, 250 flow [2023-08-04 08:46:58,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 55 transitions, 246 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:46:58,191 INFO L231 Difference]: Finished difference. Result has 42 places, 45 transitions, 130 flow [2023-08-04 08:46:58,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=421, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=42, PETRI_TRANSITIONS=45} [2023-08-04 08:46:58,192 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -2 predicate places. [2023-08-04 08:46:58,193 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 45 transitions, 130 flow [2023-08-04 08:46:58,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:46:58,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:46:58,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:46:58,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 08:46:58,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-04 08:46:58,399 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:46:58,400 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:46:58,400 INFO L85 PathProgramCache]: Analyzing trace with hash 786715421, now seen corresponding path program 1 times [2023-08-04 08:46:58,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:46:58,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386646850] [2023-08-04 08:46:58,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:46:58,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:46:58,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:46:58,502 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:46:58,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:46:58,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386646850] [2023-08-04 08:46:58,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386646850] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:46:58,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836625247] [2023-08-04 08:46:58,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:46:58,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:46:58,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:46:58,504 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:46:58,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 08:46:58,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:46:58,587 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:46:58,588 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:46:58,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:46:58,597 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:46:58,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836625247] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:46:58,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:46:58,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:46:58,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585068320] [2023-08-04 08:46:58,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:46:58,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:46:58,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:46:58,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:46:58,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:46:58,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 421 [2023-08-04 08:46:58,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 45 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 187.66666666666666) internal successors, (563), 3 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:46:58,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:46:58,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 421 [2023-08-04 08:46:58,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:46:58,794 INFO L124 PetriNetUnfolderBase]: 1146/1840 cut-off events. [2023-08-04 08:46:58,794 INFO L125 PetriNetUnfolderBase]: For 122/122 co-relation queries the response was YES. [2023-08-04 08:46:58,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3898 conditions, 1840 events. 1146/1840 cut-off events. For 122/122 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 7266 event pairs, 675 based on Foata normal form. 0/1470 useless extension candidates. Maximal degree in co-relation 3046. Up to 1464 conditions per place. [2023-08-04 08:46:58,805 INFO L140 encePairwiseOnDemand]: 418/421 looper letters, 54 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-08-04 08:46:58,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 59 transitions, 276 flow [2023-08-04 08:46:58,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:46:58,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:46:58,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 603 transitions. [2023-08-04 08:46:58,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47743467933491684 [2023-08-04 08:46:58,808 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 603 transitions. [2023-08-04 08:46:58,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 603 transitions. [2023-08-04 08:46:58,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:46:58,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 603 transitions. [2023-08-04 08:46:58,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.0) internal successors, (603), 3 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:46:58,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 421.0) internal successors, (1684), 4 states have internal predecessors, (1684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:46:58,813 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 421.0) internal successors, (1684), 4 states have internal predecessors, (1684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:46:58,813 INFO L175 Difference]: Start difference. First operand has 42 places, 45 transitions, 130 flow. Second operand 3 states and 603 transitions. [2023-08-04 08:46:58,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 59 transitions, 276 flow [2023-08-04 08:46:58,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 59 transitions, 272 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:46:58,815 INFO L231 Difference]: Finished difference. Result has 43 places, 46 transitions, 138 flow [2023-08-04 08:46:58,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=421, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=43, PETRI_TRANSITIONS=46} [2023-08-04 08:46:58,816 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -1 predicate places. [2023-08-04 08:46:58,816 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 46 transitions, 138 flow [2023-08-04 08:46:58,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.66666666666666) internal successors, (563), 3 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:46:58,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:46:58,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:46:58,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 08:46:59,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:46:59,023 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:46:59,024 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:46:59,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1805024134, now seen corresponding path program 1 times [2023-08-04 08:46:59,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:46:59,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652238435] [2023-08-04 08:46:59,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:46:59,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:46:59,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:46:59,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:46:59,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:46:59,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652238435] [2023-08-04 08:46:59,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652238435] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:46:59,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823360452] [2023-08-04 08:46:59,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:46:59,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:46:59,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:46:59,126 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:46:59,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 08:46:59,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:46:59,215 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:46:59,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:46:59,222 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:46:59,223 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:46:59,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823360452] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:46:59,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:46:59,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:46:59,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331658709] [2023-08-04 08:46:59,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:46:59,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:46:59,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:46:59,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:46:59,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:46:59,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 421 [2023-08-04 08:46:59,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 46 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:46:59,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:46:59,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 421 [2023-08-04 08:46:59,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:46:59,405 INFO L124 PetriNetUnfolderBase]: 959/1561 cut-off events. [2023-08-04 08:46:59,406 INFO L125 PetriNetUnfolderBase]: For 125/125 co-relation queries the response was YES. [2023-08-04 08:46:59,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3435 conditions, 1561 events. 959/1561 cut-off events. For 125/125 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 5934 event pairs, 624 based on Foata normal form. 0/1332 useless extension candidates. Maximal degree in co-relation 2673. Up to 1258 conditions per place. [2023-08-04 08:46:59,414 INFO L140 encePairwiseOnDemand]: 418/421 looper letters, 55 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2023-08-04 08:46:59,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 60 transitions, 286 flow [2023-08-04 08:46:59,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:46:59,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:46:59,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 603 transitions. [2023-08-04 08:46:59,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47743467933491684 [2023-08-04 08:46:59,417 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 603 transitions. [2023-08-04 08:46:59,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 603 transitions. [2023-08-04 08:46:59,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:46:59,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 603 transitions. [2023-08-04 08:46:59,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.0) internal successors, (603), 3 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:46:59,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 421.0) internal successors, (1684), 4 states have internal predecessors, (1684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:46:59,422 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 421.0) internal successors, (1684), 4 states have internal predecessors, (1684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:46:59,422 INFO L175 Difference]: Start difference. First operand has 43 places, 46 transitions, 138 flow. Second operand 3 states and 603 transitions. [2023-08-04 08:46:59,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 60 transitions, 286 flow [2023-08-04 08:46:59,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 60 transitions, 284 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:46:59,427 INFO L231 Difference]: Finished difference. Result has 45 places, 47 transitions, 148 flow [2023-08-04 08:46:59,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=421, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=45, PETRI_TRANSITIONS=47} [2023-08-04 08:46:59,429 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 1 predicate places. [2023-08-04 08:46:59,429 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 47 transitions, 148 flow [2023-08-04 08:46:59,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:46:59,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:46:59,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:46:59,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 08:46:59,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:46:59,636 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:46:59,636 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:46:59,636 INFO L85 PathProgramCache]: Analyzing trace with hash 799403695, now seen corresponding path program 1 times [2023-08-04 08:46:59,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:46:59,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572134265] [2023-08-04 08:46:59,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:46:59,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:46:59,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:46:59,724 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:46:59,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:46:59,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572134265] [2023-08-04 08:46:59,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572134265] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:46:59,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62952001] [2023-08-04 08:46:59,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:46:59,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:46:59,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:46:59,726 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:46:59,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 08:46:59,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:46:59,819 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:46:59,820 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:46:59,831 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:46:59,832 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:46:59,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62952001] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:46:59,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:46:59,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 08:46:59,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244341112] [2023-08-04 08:46:59,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:46:59,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:46:59,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:46:59,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:46:59,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:46:59,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 421 [2023-08-04 08:46:59,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 47 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 191.0) internal successors, (573), 3 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:46:59,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:46:59,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 421 [2023-08-04 08:46:59,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:47:00,007 INFO L124 PetriNetUnfolderBase]: 949/1543 cut-off events. [2023-08-04 08:47:00,008 INFO L125 PetriNetUnfolderBase]: For 148/148 co-relation queries the response was YES. [2023-08-04 08:47:00,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3445 conditions, 1543 events. 949/1543 cut-off events. For 148/148 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 5838 event pairs, 713 based on Foata normal form. 0/1337 useless extension candidates. Maximal degree in co-relation 2682. Up to 1445 conditions per place. [2023-08-04 08:47:00,016 INFO L140 encePairwiseOnDemand]: 418/421 looper letters, 49 selfloop transitions, 2 changer transitions 3/57 dead transitions. [2023-08-04 08:47:00,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 57 transitions, 276 flow [2023-08-04 08:47:00,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:47:00,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:47:00,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 599 transitions. [2023-08-04 08:47:00,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4742676167854315 [2023-08-04 08:47:00,019 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 599 transitions. [2023-08-04 08:47:00,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 599 transitions. [2023-08-04 08:47:00,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:47:00,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 599 transitions. [2023-08-04 08:47:00,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:00,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 421.0) internal successors, (1684), 4 states have internal predecessors, (1684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:00,024 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 421.0) internal successors, (1684), 4 states have internal predecessors, (1684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:00,024 INFO L175 Difference]: Start difference. First operand has 45 places, 47 transitions, 148 flow. Second operand 3 states and 599 transitions. [2023-08-04 08:47:00,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 57 transitions, 276 flow [2023-08-04 08:47:00,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 57 transitions, 274 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:47:00,031 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 146 flow [2023-08-04 08:47:00,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=421, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2023-08-04 08:47:00,033 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2023-08-04 08:47:00,033 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 146 flow [2023-08-04 08:47:00,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 191.0) internal successors, (573), 3 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:00,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:47:00,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:47:00,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 08:47:00,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:47:00,243 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:47:00,243 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:47:00,243 INFO L85 PathProgramCache]: Analyzing trace with hash 264915390, now seen corresponding path program 1 times [2023-08-04 08:47:00,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:47:00,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535724625] [2023-08-04 08:47:00,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:47:00,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:47:00,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:47:00,315 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:47:00,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:47:00,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535724625] [2023-08-04 08:47:00,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535724625] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:47:00,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585576784] [2023-08-04 08:47:00,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:47:00,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:47:00,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:47:00,317 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:47:00,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 08:47:00,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:47:00,410 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 08:47:00,414 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:47:00,458 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 08:47:00,458 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:47:00,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585576784] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:47:00,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:47:00,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 08:47:00,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467814536] [2023-08-04 08:47:00,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:47:00,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:47:00,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:47:00,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:47:00,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:47:00,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 421 [2023-08-04 08:47:00,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 193.0) internal successors, (579), 3 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:00,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:47:00,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 421 [2023-08-04 08:47:00,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:47:00,636 INFO L124 PetriNetUnfolderBase]: 908/1451 cut-off events. [2023-08-04 08:47:00,636 INFO L125 PetriNetUnfolderBase]: For 103/103 co-relation queries the response was YES. [2023-08-04 08:47:00,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3224 conditions, 1451 events. 908/1451 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 5317 event pairs, 697 based on Foata normal form. 1/1255 useless extension candidates. Maximal degree in co-relation 3097. Up to 1397 conditions per place. [2023-08-04 08:47:00,643 INFO L140 encePairwiseOnDemand]: 418/421 looper letters, 41 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2023-08-04 08:47:00,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 46 transitions, 234 flow [2023-08-04 08:47:00,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:47:00,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:47:00,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 590 transitions. [2023-08-04 08:47:00,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4671417260490895 [2023-08-04 08:47:00,646 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 590 transitions. [2023-08-04 08:47:00,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 590 transitions. [2023-08-04 08:47:00,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:47:00,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 590 transitions. [2023-08-04 08:47:00,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:00,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 421.0) internal successors, (1684), 4 states have internal predecessors, (1684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:00,650 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 421.0) internal successors, (1684), 4 states have internal predecessors, (1684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:00,650 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 146 flow. Second operand 3 states and 590 transitions. [2023-08-04 08:47:00,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 46 transitions, 234 flow [2023-08-04 08:47:00,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 46 transitions, 230 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:47:00,654 INFO L231 Difference]: Finished difference. Result has 48 places, 46 transitions, 154 flow [2023-08-04 08:47:00,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=421, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=48, PETRI_TRANSITIONS=46} [2023-08-04 08:47:00,654 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 4 predicate places. [2023-08-04 08:47:00,654 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 46 transitions, 154 flow [2023-08-04 08:47:00,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 193.0) internal successors, (579), 3 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:00,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:47:00,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:47:00,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 08:47:00,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:47:00,861 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:47:00,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:47:00,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1765771111, now seen corresponding path program 1 times [2023-08-04 08:47:00,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:47:00,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142459963] [2023-08-04 08:47:00,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:47:00,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:47:00,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:47:00,930 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 08:47:00,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:47:00,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142459963] [2023-08-04 08:47:00,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142459963] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:47:00,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849390889] [2023-08-04 08:47:00,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:47:00,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:47:00,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:47:00,933 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:47:00,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 08:47:01,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:47:01,030 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:47:01,032 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:47:01,049 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 08:47:01,049 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:47:01,068 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 08:47:01,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849390889] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:47:01,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:47:01,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:47:01,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105335894] [2023-08-04 08:47:01,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:47:01,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:47:01,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:47:01,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:47:01,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:47:01,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 421 [2023-08-04 08:47:01,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 46 transitions, 154 flow. Second operand has 5 states, 5 states have (on average 188.6) internal successors, (943), 5 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:01,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:47:01,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 421 [2023-08-04 08:47:01,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:47:01,109 INFO L124 PetriNetUnfolderBase]: 10/26 cut-off events. [2023-08-04 08:47:01,109 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:47:01,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 26 events. 10/26 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 32 event pairs, 0 based on Foata normal form. 4/27 useless extension candidates. Maximal degree in co-relation 62. Up to 16 conditions per place. [2023-08-04 08:47:01,109 INFO L140 encePairwiseOnDemand]: 418/421 looper letters, 0 selfloop transitions, 0 changer transitions 16/16 dead transitions. [2023-08-04 08:47:01,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 16 transitions, 78 flow [2023-08-04 08:47:01,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:47:01,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:47:01,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 740 transitions. [2023-08-04 08:47:01,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43942992874109266 [2023-08-04 08:47:01,112 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 740 transitions. [2023-08-04 08:47:01,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 740 transitions. [2023-08-04 08:47:01,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:47:01,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 740 transitions. [2023-08-04 08:47:01,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:01,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 421.0) internal successors, (2105), 5 states have internal predecessors, (2105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:01,116 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 421.0) internal successors, (2105), 5 states have internal predecessors, (2105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:01,117 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 154 flow. Second operand 4 states and 740 transitions. [2023-08-04 08:47:01,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 16 transitions, 78 flow [2023-08-04 08:47:01,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 16 transitions, 72 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 08:47:01,117 INFO L231 Difference]: Finished difference. Result has 22 places, 0 transitions, 0 flow [2023-08-04 08:47:01,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=421, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=22, PETRI_TRANSITIONS=0} [2023-08-04 08:47:01,118 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -22 predicate places. [2023-08-04 08:47:01,118 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 0 transitions, 0 flow [2023-08-04 08:47:01,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 188.6) internal successors, (943), 5 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:01,138 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 08:47:01,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-04 08:47:01,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:47:01,344 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:47:01,346 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 08:47:01,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 197 places, 217 transitions, 476 flow [2023-08-04 08:47:01,400 INFO L124 PetriNetUnfolderBase]: 95/666 cut-off events. [2023-08-04 08:47:01,400 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 08:47:01,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 727 conditions, 666 events. 95/666 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3103 event pairs, 0 based on Foata normal form. 0/561 useless extension candidates. Maximal degree in co-relation 383. Up to 16 conditions per place. [2023-08-04 08:47:01,403 INFO L82 GeneralOperation]: Start removeDead. Operand has 197 places, 217 transitions, 476 flow [2023-08-04 08:47:01,405 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 197 places, 217 transitions, 476 flow [2023-08-04 08:47:01,406 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:47:01,406 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 197 places, 217 transitions, 476 flow [2023-08-04 08:47:01,406 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 197 places, 217 transitions, 476 flow [2023-08-04 08:47:01,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 197 places, 217 transitions, 476 flow [2023-08-04 08:47:01,454 INFO L124 PetriNetUnfolderBase]: 95/666 cut-off events. [2023-08-04 08:47:01,454 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 08:47:01,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 727 conditions, 666 events. 95/666 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3103 event pairs, 0 based on Foata normal form. 0/561 useless extension candidates. Maximal degree in co-relation 383. Up to 16 conditions per place. [2023-08-04 08:47:01,464 INFO L119 LiptonReduction]: Number of co-enabled transitions 4842 [2023-08-04 08:47:07,289 INFO L134 LiptonReduction]: Checked pairs total: 10507 [2023-08-04 08:47:07,289 INFO L136 LiptonReduction]: Total number of compositions: 198 [2023-08-04 08:47:07,291 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 08:47:07,291 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7c6784a8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:47:07,292 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 08:47:07,295 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:47:07,295 INFO L124 PetriNetUnfolderBase]: 3/33 cut-off events. [2023-08-04 08:47:07,295 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:47:07,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:47:07,295 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-04 08:47:07,296 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:47:07,296 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:47:07,296 INFO L85 PathProgramCache]: Analyzing trace with hash -323827252, now seen corresponding path program 1 times [2023-08-04 08:47:07,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:47:07,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76768936] [2023-08-04 08:47:07,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:47:07,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:47:07,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:47:07,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:47:07,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:47:07,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76768936] [2023-08-04 08:47:07,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76768936] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:47:07,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:47:07,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:47:07,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360438188] [2023-08-04 08:47:07,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:47:07,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:47:07,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:47:07,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:47:07,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:47:07,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 415 [2023-08-04 08:47:07,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 49 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 183.66666666666666) internal successors, (551), 3 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:07,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:47:07,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 415 [2023-08-04 08:47:07,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:47:07,574 INFO L124 PetriNetUnfolderBase]: 1856/2970 cut-off events. [2023-08-04 08:47:07,575 INFO L125 PetriNetUnfolderBase]: For 220/220 co-relation queries the response was YES. [2023-08-04 08:47:07,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6043 conditions, 2970 events. 1856/2970 cut-off events. For 220/220 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 14549 event pairs, 1326 based on Foata normal form. 0/2275 useless extension candidates. Maximal degree in co-relation 4890. Up to 2796 conditions per place. [2023-08-04 08:47:07,583 INFO L140 encePairwiseOnDemand]: 411/415 looper letters, 22 selfloop transitions, 2 changer transitions 22/49 dead transitions. [2023-08-04 08:47:07,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 49 transitions, 226 flow [2023-08-04 08:47:07,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:47:07,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:47:07,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 591 transitions. [2023-08-04 08:47:07,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4746987951807229 [2023-08-04 08:47:07,586 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 591 transitions. [2023-08-04 08:47:07,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 591 transitions. [2023-08-04 08:47:07,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:47:07,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 591 transitions. [2023-08-04 08:47:07,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 197.0) internal successors, (591), 3 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:07,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 415.0) internal successors, (1660), 4 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:07,589 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 415.0) internal successors, (1660), 4 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:07,589 INFO L175 Difference]: Start difference. First operand has 44 places, 49 transitions, 140 flow. Second operand 3 states and 591 transitions. [2023-08-04 08:47:07,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 49 transitions, 226 flow [2023-08-04 08:47:07,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 49 transitions, 226 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:47:07,593 INFO L231 Difference]: Finished difference. Result has 46 places, 27 transitions, 79 flow [2023-08-04 08:47:07,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=79, PETRI_PLACES=46, PETRI_TRANSITIONS=27} [2023-08-04 08:47:07,594 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 2 predicate places. [2023-08-04 08:47:07,594 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 27 transitions, 79 flow [2023-08-04 08:47:07,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.66666666666666) internal successors, (551), 3 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:07,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:47:07,595 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-04 08:47:07,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 08:47:07,595 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:47:07,595 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:47:07,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1597105797, now seen corresponding path program 1 times [2023-08-04 08:47:07,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:47:07,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959383848] [2023-08-04 08:47:07,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:47:07,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:47:07,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:47:07,647 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 08:47:07,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:47:07,708 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 08:47:07,708 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 08:47:07,708 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 08:47:07,708 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 08:47:07,710 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 08:47:07,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-04 08:47:07,710 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 08:47:07,711 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 08:47:07,712 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 08:47:07,712 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 08:47:07,743 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 08:47:07,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 229 places, 256 transitions, 602 flow [2023-08-04 08:47:08,196 INFO L124 PetriNetUnfolderBase]: 857/4067 cut-off events. [2023-08-04 08:47:08,197 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 08:47:08,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4741 conditions, 4067 events. 857/4067 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 32289 event pairs, 11 based on Foata normal form. 0/3454 useless extension candidates. Maximal degree in co-relation 2417. Up to 192 conditions per place. [2023-08-04 08:47:08,232 INFO L82 GeneralOperation]: Start removeDead. Operand has 229 places, 256 transitions, 602 flow [2023-08-04 08:47:08,256 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 229 places, 256 transitions, 602 flow [2023-08-04 08:47:08,256 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:47:08,256 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 229 places, 256 transitions, 602 flow [2023-08-04 08:47:08,257 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 229 places, 256 transitions, 602 flow [2023-08-04 08:47:08,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 229 places, 256 transitions, 602 flow [2023-08-04 08:47:08,725 INFO L124 PetriNetUnfolderBase]: 857/4067 cut-off events. [2023-08-04 08:47:08,725 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 08:47:08,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4741 conditions, 4067 events. 857/4067 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 32289 event pairs, 11 based on Foata normal form. 0/3454 useless extension candidates. Maximal degree in co-relation 2417. Up to 192 conditions per place. [2023-08-04 08:47:08,806 INFO L119 LiptonReduction]: Number of co-enabled transitions 12312 [2023-08-04 08:47:15,662 INFO L134 LiptonReduction]: Checked pairs total: 34019 [2023-08-04 08:47:15,662 INFO L136 LiptonReduction]: Total number of compositions: 220 [2023-08-04 08:47:15,663 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:47:15,664 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7c6784a8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:47:15,664 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:47:15,666 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:47:15,666 INFO L124 PetriNetUnfolderBase]: 3/32 cut-off events. [2023-08-04 08:47:15,666 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 08:47:15,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:47:15,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:47:15,667 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:47:15,667 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:47:15,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1632948771, now seen corresponding path program 1 times [2023-08-04 08:47:15,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:47:15,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773172294] [2023-08-04 08:47:15,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:47:15,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:47:15,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:47:15,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:47:15,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:47:15,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773172294] [2023-08-04 08:47:15,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773172294] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:47:15,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:47:15,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:47:15,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340132773] [2023-08-04 08:47:15,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:47:15,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:47:15,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:47:15,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:47:15,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:47:15,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 476 [2023-08-04 08:47:15,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 73 transitions, 236 flow. Second operand has 3 states, 3 states have (on average 205.66666666666666) internal successors, (617), 3 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:15,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:47:15,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 476 [2023-08-04 08:47:15,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:47:36,686 INFO L124 PetriNetUnfolderBase]: 262951/339948 cut-off events. [2023-08-04 08:47:36,686 INFO L125 PetriNetUnfolderBase]: For 45262/45262 co-relation queries the response was YES. [2023-08-04 08:47:37,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 695400 conditions, 339948 events. 262951/339948 cut-off events. For 45262/45262 co-relation queries the response was YES. Maximal size of possible extension queue 4933. Compared 2005801 event pairs, 152324 based on Foata normal form. 0/268685 useless extension candidates. Maximal degree in co-relation 209957. Up to 325826 conditions per place. [2023-08-04 08:47:39,178 INFO L140 encePairwiseOnDemand]: 472/476 looper letters, 67 selfloop transitions, 2 changer transitions 3/78 dead transitions. [2023-08-04 08:47:39,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 78 transitions, 384 flow [2023-08-04 08:47:39,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:47:39,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:47:39,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 680 transitions. [2023-08-04 08:47:39,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2023-08-04 08:47:39,181 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 680 transitions. [2023-08-04 08:47:39,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 680 transitions. [2023-08-04 08:47:39,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:47:39,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 680 transitions. [2023-08-04 08:47:39,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 226.66666666666666) internal successors, (680), 3 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:39,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 476.0) internal successors, (1904), 4 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:39,186 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 476.0) internal successors, (1904), 4 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:39,186 INFO L175 Difference]: Start difference. First operand has 63 places, 73 transitions, 236 flow. Second operand 3 states and 680 transitions. [2023-08-04 08:47:39,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 78 transitions, 384 flow [2023-08-04 08:47:39,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 78 transitions, 384 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:47:39,218 INFO L231 Difference]: Finished difference. Result has 65 places, 70 transitions, 228 flow [2023-08-04 08:47:39,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=228, PETRI_PLACES=65, PETRI_TRANSITIONS=70} [2023-08-04 08:47:39,219 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 2 predicate places. [2023-08-04 08:47:39,219 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 70 transitions, 228 flow [2023-08-04 08:47:39,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 205.66666666666666) internal successors, (617), 3 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:39,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:47:39,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:47:39,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-04 08:47:39,220 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:47:39,220 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:47:39,220 INFO L85 PathProgramCache]: Analyzing trace with hash 864753102, now seen corresponding path program 1 times [2023-08-04 08:47:39,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:47:39,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584134377] [2023-08-04 08:47:39,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:47:39,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:47:39,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:47:39,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:47:39,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:47:39,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584134377] [2023-08-04 08:47:39,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584134377] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:47:39,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572548254] [2023-08-04 08:47:39,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:47:39,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:47:39,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:47:39,314 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:47:39,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 08:47:39,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:47:39,419 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:47:39,420 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:47:39,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:47:39,428 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:47:39,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572548254] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:47:39,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:47:39,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:47:39,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246229398] [2023-08-04 08:47:39,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:47:39,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:47:39,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:47:39,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:47:39,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:47:39,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 476 [2023-08-04 08:47:39,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 70 transitions, 228 flow. Second operand has 3 states, 3 states have (on average 206.66666666666666) internal successors, (620), 3 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:39,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:47:39,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 476 [2023-08-04 08:47:39,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:47:59,732 INFO L124 PetriNetUnfolderBase]: 261851/338380 cut-off events. [2023-08-04 08:47:59,732 INFO L125 PetriNetUnfolderBase]: For 38898/38898 co-relation queries the response was YES. [2023-08-04 08:48:00,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 691011 conditions, 338380 events. 261851/338380 cut-off events. For 38898/38898 co-relation queries the response was YES. Maximal size of possible extension queue 4956. Compared 1985257 event pairs, 151899 based on Foata normal form. 0/267282 useless extension candidates. Maximal degree in co-relation 690963. Up to 323977 conditions per place. [2023-08-04 08:48:01,807 INFO L140 encePairwiseOnDemand]: 473/476 looper letters, 76 selfloop transitions, 2 changer transitions 0/84 dead transitions. [2023-08-04 08:48:01,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 84 transitions, 412 flow [2023-08-04 08:48:01,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:48:01,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:48:01,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 687 transitions. [2023-08-04 08:48:01,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4810924369747899 [2023-08-04 08:48:01,810 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 687 transitions. [2023-08-04 08:48:01,810 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 687 transitions. [2023-08-04 08:48:01,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:48:01,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 687 transitions. [2023-08-04 08:48:01,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 229.0) internal successors, (687), 3 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:48:01,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 476.0) internal successors, (1904), 4 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:48:01,814 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 476.0) internal successors, (1904), 4 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:48:01,815 INFO L175 Difference]: Start difference. First operand has 65 places, 70 transitions, 228 flow. Second operand 3 states and 687 transitions. [2023-08-04 08:48:01,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 84 transitions, 412 flow [2023-08-04 08:48:01,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 84 transitions, 398 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 08:48:01,965 INFO L231 Difference]: Finished difference. Result has 61 places, 71 transitions, 226 flow [2023-08-04 08:48:01,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=226, PETRI_PLACES=61, PETRI_TRANSITIONS=71} [2023-08-04 08:48:01,966 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -2 predicate places. [2023-08-04 08:48:01,966 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 71 transitions, 226 flow [2023-08-04 08:48:01,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 206.66666666666666) internal successors, (620), 3 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:48:01,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:48:01,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:48:01,973 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-04 08:48:02,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-04 08:48:02,173 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:48:02,173 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:48:02,173 INFO L85 PathProgramCache]: Analyzing trace with hash 521576332, now seen corresponding path program 1 times [2023-08-04 08:48:02,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:48:02,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374000681] [2023-08-04 08:48:02,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:48:02,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:48:02,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:48:02,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:48:02,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:48:02,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374000681] [2023-08-04 08:48:02,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374000681] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:48:02,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580432650] [2023-08-04 08:48:02,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:48:02,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:48:02,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:48:02,235 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:48:02,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-04 08:48:02,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:48:02,333 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:48:02,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:48:02,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:48:02,344 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:48:02,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580432650] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:48:02,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:48:02,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:48:02,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007429641] [2023-08-04 08:48:02,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:48:02,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:48:02,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:48:02,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:48:02,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:48:02,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 476 [2023-08-04 08:48:02,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 71 transitions, 226 flow. Second operand has 3 states, 3 states have (on average 207.66666666666666) internal successors, (623), 3 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:48:02,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:48:02,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 476 [2023-08-04 08:48:02,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:48:21,742 INFO L124 PetriNetUnfolderBase]: 261451/339032 cut-off events. [2023-08-04 08:48:21,743 INFO L125 PetriNetUnfolderBase]: For 18076/18076 co-relation queries the response was YES. [2023-08-04 08:48:22,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 691276 conditions, 339032 events. 261451/339032 cut-off events. For 18076/18076 co-relation queries the response was YES. Maximal size of possible extension queue 5400. Compared 2007443 event pairs, 165838 based on Foata normal form. 0/269100 useless extension candidates. Maximal degree in co-relation 210186. Up to 316573 conditions per place. [2023-08-04 08:48:23,635 INFO L140 encePairwiseOnDemand]: 473/476 looper letters, 82 selfloop transitions, 2 changer transitions 0/90 dead transitions. [2023-08-04 08:48:23,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 90 transitions, 432 flow [2023-08-04 08:48:23,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:48:23,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:48:23,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 692 transitions. [2023-08-04 08:48:23,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.484593837535014 [2023-08-04 08:48:23,637 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 692 transitions. [2023-08-04 08:48:23,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 692 transitions. [2023-08-04 08:48:23,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:48:23,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 692 transitions. [2023-08-04 08:48:23,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 230.66666666666666) internal successors, (692), 3 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:48:23,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 476.0) internal successors, (1904), 4 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:48:23,640 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 476.0) internal successors, (1904), 4 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:48:23,640 INFO L175 Difference]: Start difference. First operand has 61 places, 71 transitions, 226 flow. Second operand 3 states and 692 transitions. [2023-08-04 08:48:23,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 90 transitions, 432 flow [2023-08-04 08:48:23,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 90 transitions, 430 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:48:23,649 INFO L231 Difference]: Finished difference. Result has 63 places, 72 transitions, 236 flow [2023-08-04 08:48:23,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=236, PETRI_PLACES=63, PETRI_TRANSITIONS=72} [2023-08-04 08:48:23,650 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 0 predicate places. [2023-08-04 08:48:23,650 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 72 transitions, 236 flow [2023-08-04 08:48:23,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 207.66666666666666) internal successors, (623), 3 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:48:23,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:48:23,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:48:23,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-04 08:48:23,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-04 08:48:23,863 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:48:23,864 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:48:23,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1853406045, now seen corresponding path program 1 times [2023-08-04 08:48:23,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:48:23,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917973599] [2023-08-04 08:48:23,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:48:23,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:48:23,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:48:23,906 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:48:23,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:48:23,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917973599] [2023-08-04 08:48:23,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917973599] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:48:23,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929265800] [2023-08-04 08:48:23,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:48:23,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:48:23,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:48:23,907 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:48:23,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 08:48:24,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:48:24,008 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:48:24,009 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:48:24,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:48:24,015 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:48:24,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929265800] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:48:24,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:48:24,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:48:24,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091823741] [2023-08-04 08:48:24,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:48:24,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:48:24,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:48:24,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:48:24,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:48:24,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 476 [2023-08-04 08:48:24,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 72 transitions, 236 flow. Second operand has 3 states, 3 states have (on average 208.66666666666666) internal successors, (626), 3 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:48:24,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:48:24,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 476 [2023-08-04 08:48:24,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:48:43,727 INFO L124 PetriNetUnfolderBase]: 231779/302096 cut-off events. [2023-08-04 08:48:43,727 INFO L125 PetriNetUnfolderBase]: For 20266/20266 co-relation queries the response was YES. [2023-08-04 08:48:44,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 623869 conditions, 302096 events. 231779/302096 cut-off events. For 20266/20266 co-relation queries the response was YES. Maximal size of possible extension queue 4575. Compared 1781900 event pairs, 140339 based on Foata normal form. 0/242944 useless extension candidates. Maximal degree in co-relation 184936. Up to 244925 conditions per place. [2023-08-04 08:48:45,703 INFO L140 encePairwiseOnDemand]: 473/476 looper letters, 90 selfloop transitions, 2 changer transitions 0/98 dead transitions. [2023-08-04 08:48:45,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 98 transitions, 487 flow [2023-08-04 08:48:45,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:48:45,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:48:45,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 699 transitions. [2023-08-04 08:48:45,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4894957983193277 [2023-08-04 08:48:45,705 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 699 transitions. [2023-08-04 08:48:45,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 699 transitions. [2023-08-04 08:48:45,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:48:45,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 699 transitions. [2023-08-04 08:48:45,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 233.0) internal successors, (699), 3 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:48:45,708 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 476.0) internal successors, (1904), 4 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:48:45,708 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 476.0) internal successors, (1904), 4 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:48:45,708 INFO L175 Difference]: Start difference. First operand has 63 places, 72 transitions, 236 flow. Second operand 3 states and 699 transitions. [2023-08-04 08:48:45,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 98 transitions, 487 flow [2023-08-04 08:48:45,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 98 transitions, 485 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:48:45,730 INFO L231 Difference]: Finished difference. Result has 65 places, 73 transitions, 246 flow [2023-08-04 08:48:45,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=246, PETRI_PLACES=65, PETRI_TRANSITIONS=73} [2023-08-04 08:48:45,731 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 2 predicate places. [2023-08-04 08:48:45,731 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 73 transitions, 246 flow [2023-08-04 08:48:45,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 208.66666666666666) internal successors, (626), 3 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:48:45,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:48:45,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:48:45,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-04 08:48:45,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-04 08:48:45,933 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:48:45,933 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:48:45,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1057631044, now seen corresponding path program 1 times [2023-08-04 08:48:45,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:48:45,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830982913] [2023-08-04 08:48:45,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:48:45,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:48:45,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:48:46,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:48:46,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:48:46,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830982913] [2023-08-04 08:48:46,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830982913] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:48:46,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696064362] [2023-08-04 08:48:46,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:48:46,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:48:46,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:48:46,009 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:48:46,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 08:48:46,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:48:46,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:48:46,118 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:48:46,126 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:48:46,126 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:48:46,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696064362] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:48:46,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:48:46,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:48:46,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171486200] [2023-08-04 08:48:46,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:48:46,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:48:46,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:48:46,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:48:46,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:48:46,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 476 [2023-08-04 08:48:46,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 73 transitions, 246 flow. Second operand has 3 states, 3 states have (on average 210.0) internal successors, (630), 3 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:48:46,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:48:46,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 476 [2023-08-04 08:48:46,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:49:02,665 INFO L124 PetriNetUnfolderBase]: 214918/282647 cut-off events. [2023-08-04 08:49:02,666 INFO L125 PetriNetUnfolderBase]: For 35112/35112 co-relation queries the response was YES. [2023-08-04 08:49:03,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 601599 conditions, 282647 events. 214918/282647 cut-off events. For 35112/35112 co-relation queries the response was YES. Maximal size of possible extension queue 3677. Compared 1676941 event pairs, 127568 based on Foata normal form. 0/234948 useless extension candidates. Maximal degree in co-relation 188134. Up to 214261 conditions per place. [2023-08-04 08:49:04,565 INFO L140 encePairwiseOnDemand]: 473/476 looper letters, 91 selfloop transitions, 2 changer transitions 0/99 dead transitions. [2023-08-04 08:49:04,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 99 transitions, 499 flow [2023-08-04 08:49:04,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:49:04,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:49:04,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 699 transitions. [2023-08-04 08:49:04,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4894957983193277 [2023-08-04 08:49:04,568 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 699 transitions. [2023-08-04 08:49:04,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 699 transitions. [2023-08-04 08:49:04,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:49:04,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 699 transitions. [2023-08-04 08:49:04,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 233.0) internal successors, (699), 3 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:49:04,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 476.0) internal successors, (1904), 4 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:49:04,572 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 476.0) internal successors, (1904), 4 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:49:04,572 INFO L175 Difference]: Start difference. First operand has 65 places, 73 transitions, 246 flow. Second operand 3 states and 699 transitions. [2023-08-04 08:49:04,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 99 transitions, 499 flow [2023-08-04 08:49:05,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 99 transitions, 497 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:49:05,031 INFO L231 Difference]: Finished difference. Result has 67 places, 74 transitions, 256 flow [2023-08-04 08:49:05,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=256, PETRI_PLACES=67, PETRI_TRANSITIONS=74} [2023-08-04 08:49:05,031 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 4 predicate places. [2023-08-04 08:49:05,031 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 74 transitions, 256 flow [2023-08-04 08:49:05,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 210.0) internal successors, (630), 3 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:49:05,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:49:05,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:49:05,037 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-04 08:49:05,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-04 08:49:05,237 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:49:05,237 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:49:05,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1562907029, now seen corresponding path program 1 times [2023-08-04 08:49:05,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:49:05,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363158085] [2023-08-04 08:49:05,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:49:05,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:49:05,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:49:05,302 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:49:05,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:49:05,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363158085] [2023-08-04 08:49:05,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363158085] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:49:05,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933123212] [2023-08-04 08:49:05,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:49:05,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:49:05,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:49:05,304 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:49:05,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-04 08:49:05,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:49:05,416 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:49:05,417 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:49:05,422 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:49:05,422 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:49:05,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933123212] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:49:05,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:49:05,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 08:49:05,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597910168] [2023-08-04 08:49:05,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:49:05,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:49:05,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:49:05,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:49:05,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:49:05,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 476 [2023-08-04 08:49:05,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 74 transitions, 256 flow. Second operand has 3 states, 3 states have (on average 212.0) internal successors, (636), 3 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:49:05,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:49:05,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 476 [2023-08-04 08:49:05,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:49:22,345 INFO L124 PetriNetUnfolderBase]: 213673/281886 cut-off events. [2023-08-04 08:49:22,345 INFO L125 PetriNetUnfolderBase]: For 38416/38416 co-relation queries the response was YES. [2023-08-04 08:49:23,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 610028 conditions, 281886 events. 213673/281886 cut-off events. For 38416/38416 co-relation queries the response was YES. Maximal size of possible extension queue 3574. Compared 1674697 event pairs, 145919 based on Foata normal form. 0/238616 useless extension candidates. Maximal degree in co-relation 335242. Up to 243907 conditions per place. [2023-08-04 08:49:24,308 INFO L140 encePairwiseOnDemand]: 473/476 looper letters, 92 selfloop transitions, 2 changer transitions 0/100 dead transitions. [2023-08-04 08:49:24,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 100 transitions, 511 flow [2023-08-04 08:49:24,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:49:24,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:49:24,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 699 transitions. [2023-08-04 08:49:24,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4894957983193277 [2023-08-04 08:49:24,310 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 699 transitions. [2023-08-04 08:49:24,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 699 transitions. [2023-08-04 08:49:24,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:49:24,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 699 transitions. [2023-08-04 08:49:24,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 233.0) internal successors, (699), 3 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:49:24,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 476.0) internal successors, (1904), 4 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:49:24,315 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 476.0) internal successors, (1904), 4 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:49:24,315 INFO L175 Difference]: Start difference. First operand has 67 places, 74 transitions, 256 flow. Second operand 3 states and 699 transitions. [2023-08-04 08:49:24,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 100 transitions, 511 flow [2023-08-04 08:49:33,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 100 transitions, 509 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:49:33,172 INFO L231 Difference]: Finished difference. Result has 69 places, 75 transitions, 266 flow [2023-08-04 08:49:33,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=266, PETRI_PLACES=69, PETRI_TRANSITIONS=75} [2023-08-04 08:49:33,173 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 6 predicate places. [2023-08-04 08:49:33,173 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 75 transitions, 266 flow [2023-08-04 08:49:33,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 212.0) internal successors, (636), 3 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:49:33,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:49:33,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:49:33,184 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-08-04 08:49:33,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-04 08:49:33,378 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:49:33,378 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:49:33,379 INFO L85 PathProgramCache]: Analyzing trace with hash 394470055, now seen corresponding path program 1 times [2023-08-04 08:49:33,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:49:33,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060757518] [2023-08-04 08:49:33,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:49:33,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:49:33,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:49:33,442 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:49:33,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:49:33,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060757518] [2023-08-04 08:49:33,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060757518] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:49:33,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494765791] [2023-08-04 08:49:33,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:49:33,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:49:33,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:49:33,444 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:49:33,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-04 08:49:33,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:49:33,540 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 08:49:33,541 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:49:33,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 08:49:33,553 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:49:33,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494765791] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:49:33,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:49:33,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 08:49:33,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487921143] [2023-08-04 08:49:33,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:49:33,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:49:33,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:49:33,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:49:33,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:49:33,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 476 [2023-08-04 08:49:33,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 75 transitions, 266 flow. Second operand has 3 states, 3 states have (on average 214.0) internal successors, (642), 3 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:49:33,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:49:33,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 476 [2023-08-04 08:49:33,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:49:52,146 INFO L124 PetriNetUnfolderBase]: 213673/281887 cut-off events. [2023-08-04 08:49:52,146 INFO L125 PetriNetUnfolderBase]: For 37442/37442 co-relation queries the response was YES. [2023-08-04 08:49:53,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 612883 conditions, 281887 events. 213673/281887 cut-off events. For 37442/37442 co-relation queries the response was YES. Maximal size of possible extension queue 3574. Compared 1674637 event pairs, 160286 based on Foata normal form. 1/239507 useless extension candidates. Maximal degree in co-relation 527360. Up to 269905 conditions per place. [2023-08-04 08:49:54,385 INFO L140 encePairwiseOnDemand]: 473/476 looper letters, 68 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2023-08-04 08:49:54,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 76 transitions, 408 flow [2023-08-04 08:49:54,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:49:54,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:49:54,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 674 transitions. [2023-08-04 08:49:54,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47198879551820727 [2023-08-04 08:49:54,410 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 674 transitions. [2023-08-04 08:49:54,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 674 transitions. [2023-08-04 08:49:54,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:49:54,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 674 transitions. [2023-08-04 08:49:54,412 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 224.66666666666666) internal successors, (674), 3 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:49:54,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 476.0) internal successors, (1904), 4 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:49:54,415 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 476.0) internal successors, (1904), 4 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:49:54,415 INFO L175 Difference]: Start difference. First operand has 69 places, 75 transitions, 266 flow. Second operand 3 states and 674 transitions. [2023-08-04 08:49:54,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 76 transitions, 408 flow [2023-08-04 08:50:04,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 76 transitions, 406 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:50:04,263 INFO L231 Difference]: Finished difference. Result has 71 places, 76 transitions, 276 flow [2023-08-04 08:50:04,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=276, PETRI_PLACES=71, PETRI_TRANSITIONS=76} [2023-08-04 08:50:04,264 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 8 predicate places. [2023-08-04 08:50:04,264 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 76 transitions, 276 flow [2023-08-04 08:50:04,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 214.0) internal successors, (642), 3 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:50:04,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:50:04,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:50:04,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-08-04 08:50:04,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-04 08:50:04,469 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:50:04,470 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:50:04,470 INFO L85 PathProgramCache]: Analyzing trace with hash -2070837274, now seen corresponding path program 1 times [2023-08-04 08:50:04,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:50:04,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913954602] [2023-08-04 08:50:04,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:50:04,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:50:04,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:50:04,522 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 08:50:04,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:50:04,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913954602] [2023-08-04 08:50:04,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913954602] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:50:04,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913215645] [2023-08-04 08:50:04,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:50:04,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:50:04,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:50:04,524 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:50:04,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-04 08:50:04,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:50:04,651 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:50:04,652 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:50:04,663 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 08:50:04,663 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:50:04,681 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 08:50:04,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913215645] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:50:04,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:50:04,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:50:04,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855052605] [2023-08-04 08:50:04,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:50:04,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:50:04,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:50:04,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:50:04,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:50:04,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 476 [2023-08-04 08:50:04,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 76 transitions, 276 flow. Second operand has 5 states, 5 states have (on average 209.6) internal successors, (1048), 5 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:50:04,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:50:04,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 476 [2023-08-04 08:50:04,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:50:20,870 INFO L124 PetriNetUnfolderBase]: 202005/266231 cut-off events. [2023-08-04 08:50:20,871 INFO L125 PetriNetUnfolderBase]: For 31446/31446 co-relation queries the response was YES. [2023-08-04 08:50:21,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 577964 conditions, 266231 events. 202005/266231 cut-off events. For 31446/31446 co-relation queries the response was YES. Maximal size of possible extension queue 3609. Compared 1575576 event pairs, 91007 based on Foata normal form. 4/226160 useless extension candidates. Maximal degree in co-relation 577941. Up to 254843 conditions per place. [2023-08-04 08:50:22,880 INFO L140 encePairwiseOnDemand]: 472/476 looper letters, 80 selfloop transitions, 3 changer transitions 1/90 dead transitions. [2023-08-04 08:50:22,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 90 transitions, 472 flow [2023-08-04 08:50:22,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:50:22,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:50:22,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 887 transitions. [2023-08-04 08:50:22,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46586134453781514 [2023-08-04 08:50:22,883 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 887 transitions. [2023-08-04 08:50:22,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 887 transitions. [2023-08-04 08:50:22,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:50:22,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 887 transitions. [2023-08-04 08:50:22,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 221.75) internal successors, (887), 4 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:50:22,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 476.0) internal successors, (2380), 5 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:50:22,887 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 476.0) internal successors, (2380), 5 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:50:22,887 INFO L175 Difference]: Start difference. First operand has 71 places, 76 transitions, 276 flow. Second operand 4 states and 887 transitions. [2023-08-04 08:50:22,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 90 transitions, 472 flow [2023-08-04 08:50:29,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 90 transitions, 468 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 08:50:29,438 INFO L231 Difference]: Finished difference. Result has 75 places, 76 transitions, 286 flow [2023-08-04 08:50:29,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=286, PETRI_PLACES=75, PETRI_TRANSITIONS=76} [2023-08-04 08:50:29,439 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 12 predicate places. [2023-08-04 08:50:29,439 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 76 transitions, 286 flow [2023-08-04 08:50:29,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 209.6) internal successors, (1048), 5 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:50:29,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:50:29,440 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:50:29,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-04 08:50:29,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:50:29,640 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:50:29,641 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:50:29,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1523068843, now seen corresponding path program 1 times [2023-08-04 08:50:29,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:50:29,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295307691] [2023-08-04 08:50:29,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:50:29,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:50:29,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:50:29,702 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 08:50:29,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:50:29,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295307691] [2023-08-04 08:50:29,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295307691] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:50:29,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:50:29,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:50:29,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882471497] [2023-08-04 08:50:29,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:50:29,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 08:50:29,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:50:29,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 08:50:29,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 08:50:29,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 476 [2023-08-04 08:50:29,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 76 transitions, 286 flow. Second operand has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:50:29,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:50:29,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 476 [2023-08-04 08:50:29,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:50:50,151 INFO L124 PetriNetUnfolderBase]: 242218/316554 cut-off events. [2023-08-04 08:50:50,151 INFO L125 PetriNetUnfolderBase]: For 46843/46843 co-relation queries the response was YES. [2023-08-04 08:50:51,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 688889 conditions, 316554 events. 242218/316554 cut-off events. For 46843/46843 co-relation queries the response was YES. Maximal size of possible extension queue 4184. Compared 1883338 event pairs, 151733 based on Foata normal form. 0/270803 useless extension candidates. Maximal degree in co-relation 688858. Up to 254901 conditions per place. [2023-08-04 08:50:52,237 INFO L140 encePairwiseOnDemand]: 472/476 looper letters, 126 selfloop transitions, 3 changer transitions 0/135 dead transitions. [2023-08-04 08:50:52,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 135 transitions, 773 flow [2023-08-04 08:50:52,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:50:52,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:50:52,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 925 transitions. [2023-08-04 08:50:52,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48581932773109243 [2023-08-04 08:50:52,240 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 925 transitions. [2023-08-04 08:50:52,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 925 transitions. [2023-08-04 08:50:52,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:50:52,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 925 transitions. [2023-08-04 08:50:52,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 231.25) internal successors, (925), 4 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:50:52,244 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 476.0) internal successors, (2380), 5 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:50:52,244 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 476.0) internal successors, (2380), 5 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:50:52,244 INFO L175 Difference]: Start difference. First operand has 75 places, 76 transitions, 286 flow. Second operand 4 states and 925 transitions. [2023-08-04 08:50:52,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 135 transitions, 773 flow [2023-08-04 08:51:00,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 135 transitions, 755 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 08:51:00,192 INFO L231 Difference]: Finished difference. Result has 76 places, 77 transitions, 290 flow [2023-08-04 08:51:00,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=290, PETRI_PLACES=76, PETRI_TRANSITIONS=77} [2023-08-04 08:51:00,193 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 13 predicate places. [2023-08-04 08:51:00,193 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 77 transitions, 290 flow [2023-08-04 08:51:00,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:51:00,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:51:00,194 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:51:00,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-04 08:51:00,194 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:51:00,194 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:51:00,194 INFO L85 PathProgramCache]: Analyzing trace with hash -7393100, now seen corresponding path program 1 times [2023-08-04 08:51:00,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:51:00,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089027881] [2023-08-04 08:51:00,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:51:00,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:51:00,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:51:00,258 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 08:51:00,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:51:00,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089027881] [2023-08-04 08:51:00,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089027881] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:51:00,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:51:00,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:51:00,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14788230] [2023-08-04 08:51:00,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:51:00,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 08:51:00,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:51:00,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 08:51:00,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 08:51:00,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 476 [2023-08-04 08:51:00,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 77 transitions, 290 flow. Second operand has 4 states, 4 states have (on average 210.75) internal successors, (843), 4 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:51:00,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:51:00,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 476 [2023-08-04 08:51:00,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:51:27,562 INFO L124 PetriNetUnfolderBase]: 290518/378954 cut-off events. [2023-08-04 08:51:27,562 INFO L125 PetriNetUnfolderBase]: For 116778/116778 co-relation queries the response was YES. [2023-08-04 08:51:29,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 880301 conditions, 378954 events. 290518/378954 cut-off events. For 116778/116778 co-relation queries the response was YES. Maximal size of possible extension queue 4867. Compared 2282655 event pairs, 184774 based on Foata normal form. 0/326735 useless extension candidates. Maximal degree in co-relation 880270. Up to 305273 conditions per place. [2023-08-04 08:51:30,386 INFO L140 encePairwiseOnDemand]: 472/476 looper letters, 125 selfloop transitions, 3 changer transitions 0/134 dead transitions. [2023-08-04 08:51:30,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 134 transitions, 770 flow [2023-08-04 08:51:30,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:51:30,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:51:30,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 923 transitions. [2023-08-04 08:51:30,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4847689075630252 [2023-08-04 08:51:30,389 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 923 transitions. [2023-08-04 08:51:30,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 923 transitions. [2023-08-04 08:51:30,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:51:30,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 923 transitions. [2023-08-04 08:51:30,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 230.75) internal successors, (923), 4 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:51:30,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 476.0) internal successors, (2380), 5 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:51:30,393 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 476.0) internal successors, (2380), 5 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:51:30,394 INFO L175 Difference]: Start difference. First operand has 76 places, 77 transitions, 290 flow. Second operand 4 states and 923 transitions. [2023-08-04 08:51:30,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 134 transitions, 770 flow [2023-08-04 08:51:42,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 134 transitions, 760 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-04 08:51:42,580 INFO L231 Difference]: Finished difference. Result has 78 places, 78 transitions, 298 flow [2023-08-04 08:51:42,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=298, PETRI_PLACES=78, PETRI_TRANSITIONS=78} [2023-08-04 08:51:42,580 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 15 predicate places. [2023-08-04 08:51:42,580 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 78 transitions, 298 flow [2023-08-04 08:51:42,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 210.75) internal successors, (843), 4 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:51:42,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:51:42,581 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:51:42,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-04 08:51:42,581 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:51:42,581 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:51:42,581 INFO L85 PathProgramCache]: Analyzing trace with hash -195661449, now seen corresponding path program 1 times [2023-08-04 08:51:42,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:51:42,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836508224] [2023-08-04 08:51:42,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:51:42,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:51:42,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:51:42,633 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 08:51:42,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:51:42,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836508224] [2023-08-04 08:51:42,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836508224] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:51:42,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676834289] [2023-08-04 08:51:42,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:51:42,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:51:42,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:51:42,641 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:51:42,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-04 08:51:42,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:51:42,765 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:51:42,770 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:51:42,783 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 08:51:42,783 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:51:42,798 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 08:51:42,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676834289] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:51:42,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:51:42,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:51:42,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096011199] [2023-08-04 08:51:42,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:51:42,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:51:42,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:51:42,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:51:42,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:51:42,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 476 [2023-08-04 08:51:42,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 78 transitions, 298 flow. Second operand has 5 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:51:42,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:51:42,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 476 [2023-08-04 08:51:42,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:52:07,384 INFO L124 PetriNetUnfolderBase]: 275723/361864 cut-off events. [2023-08-04 08:52:07,384 INFO L125 PetriNetUnfolderBase]: For 118165/118165 co-relation queries the response was YES. [2023-08-04 08:52:08,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 870651 conditions, 361864 events. 275723/361864 cut-off events. For 118165/118165 co-relation queries the response was YES. Maximal size of possible extension queue 4801. Compared 2184123 event pairs, 132206 based on Foata normal form. 100/312108 useless extension candidates. Maximal degree in co-relation 870619. Up to 341988 conditions per place. [2023-08-04 08:52:10,191 INFO L140 encePairwiseOnDemand]: 472/476 looper letters, 102 selfloop transitions, 3 changer transitions 1/112 dead transitions. [2023-08-04 08:52:10,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 112 transitions, 610 flow [2023-08-04 08:52:10,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:52:10,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:52:10,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 903 transitions. [2023-08-04 08:52:10,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4742647058823529 [2023-08-04 08:52:10,193 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 903 transitions. [2023-08-04 08:52:10,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 903 transitions. [2023-08-04 08:52:10,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:52:10,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 903 transitions. [2023-08-04 08:52:10,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 225.75) internal successors, (903), 4 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:52:10,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 476.0) internal successors, (2380), 5 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:52:10,197 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 476.0) internal successors, (2380), 5 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:52:10,197 INFO L175 Difference]: Start difference. First operand has 78 places, 78 transitions, 298 flow. Second operand 4 states and 903 transitions. [2023-08-04 08:52:10,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 112 transitions, 610 flow [2023-08-04 08:52:24,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 112 transitions, 596 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-04 08:52:24,530 INFO L231 Difference]: Finished difference. Result has 81 places, 78 transitions, 306 flow [2023-08-04 08:52:24,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=306, PETRI_PLACES=81, PETRI_TRANSITIONS=78} [2023-08-04 08:52:24,531 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 18 predicate places. [2023-08-04 08:52:24,531 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 78 transitions, 306 flow [2023-08-04 08:52:24,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:52:24,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:52:24,531 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:52:24,537 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-08-04 08:52:24,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:52:24,732 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:52:24,733 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:52:24,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1006320748, now seen corresponding path program 1 times [2023-08-04 08:52:24,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:52:24,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685605290] [2023-08-04 08:52:24,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:52:24,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:52:24,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:52:24,807 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 08:52:24,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:52:24,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685605290] [2023-08-04 08:52:24,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685605290] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:52:24,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:52:24,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:52:24,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456848940] [2023-08-04 08:52:24,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:52:24,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 08:52:24,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:52:24,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 08:52:24,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 08:52:24,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 476 [2023-08-04 08:52:24,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 78 transitions, 306 flow. Second operand has 4 states, 4 states have (on average 211.25) internal successors, (845), 4 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:52:24,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:52:24,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 476 [2023-08-04 08:52:24,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:52:58,409 INFO L124 PetriNetUnfolderBase]: 328103/427163 cut-off events. [2023-08-04 08:52:58,409 INFO L125 PetriNetUnfolderBase]: For 117326/117326 co-relation queries the response was YES. [2023-08-04 08:53:00,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1005296 conditions, 427163 events. 328103/427163 cut-off events. For 117326/117326 co-relation queries the response was YES. Maximal size of possible extension queue 5553. Compared 2595139 event pairs, 212570 based on Foata normal form. 0/370908 useless extension candidates. Maximal degree in co-relation 1005264. Up to 344962 conditions per place. [2023-08-04 08:53:01,910 INFO L140 encePairwiseOnDemand]: 472/476 looper letters, 124 selfloop transitions, 3 changer transitions 0/133 dead transitions. [2023-08-04 08:53:01,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 133 transitions, 775 flow [2023-08-04 08:53:01,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:53:01,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:53:01,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 920 transitions. [2023-08-04 08:53:01,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4831932773109244 [2023-08-04 08:53:01,912 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 920 transitions. [2023-08-04 08:53:01,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 920 transitions. [2023-08-04 08:53:01,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:53:01,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 920 transitions. [2023-08-04 08:53:01,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:53:01,916 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 476.0) internal successors, (2380), 5 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:53:01,916 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 476.0) internal successors, (2380), 5 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:53:01,916 INFO L175 Difference]: Start difference. First operand has 81 places, 78 transitions, 306 flow. Second operand 4 states and 920 transitions. [2023-08-04 08:53:01,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 133 transitions, 775 flow [2023-08-04 08:53:23,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 133 transitions, 757 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 08:53:23,591 INFO L231 Difference]: Finished difference. Result has 82 places, 79 transitions, 310 flow [2023-08-04 08:53:23,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=310, PETRI_PLACES=82, PETRI_TRANSITIONS=79} [2023-08-04 08:53:23,592 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 19 predicate places. [2023-08-04 08:53:23,592 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 79 transitions, 310 flow [2023-08-04 08:53:23,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 211.25) internal successors, (845), 4 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:53:23,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:53:23,592 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:53:23,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-04 08:53:23,593 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:53:23,593 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:53:23,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1271723348, now seen corresponding path program 1 times [2023-08-04 08:53:23,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:53:23,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781251543] [2023-08-04 08:53:23,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:53:23,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:53:23,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:53:23,664 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-04 08:53:23,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:53:23,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781251543] [2023-08-04 08:53:23,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781251543] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:53:23,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:53:23,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:53:23,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803724472] [2023-08-04 08:53:23,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:53:23,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 08:53:23,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:53:23,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 08:53:23,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 08:53:23,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 476 [2023-08-04 08:53:23,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 79 transitions, 310 flow. Second operand has 4 states, 4 states have (on average 211.25) internal successors, (845), 4 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:53:23,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:53:23,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 476 [2023-08-04 08:53:23,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:54:02,688 INFO L124 PetriNetUnfolderBase]: 392481/509963 cut-off events. [2023-08-04 08:54:02,688 INFO L125 PetriNetUnfolderBase]: For 216802/216802 co-relation queries the response was YES. [2023-08-04 08:54:05,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1271329 conditions, 509963 events. 392481/509963 cut-off events. For 216802/216802 co-relation queries the response was YES. Maximal size of possible extension queue 6450. Compared 3136410 event pairs, 258053 based on Foata normal form. 0/446075 useless extension candidates. Maximal degree in co-relation 1271296. Up to 412286 conditions per place. [2023-08-04 08:54:08,127 INFO L140 encePairwiseOnDemand]: 472/476 looper letters, 123 selfloop transitions, 3 changer transitions 0/132 dead transitions. [2023-08-04 08:54:08,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 132 transitions, 772 flow [2023-08-04 08:54:08,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:54:08,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:54:08,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 918 transitions. [2023-08-04 08:54:08,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2023-08-04 08:54:08,129 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 918 transitions. [2023-08-04 08:54:08,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 918 transitions. [2023-08-04 08:54:08,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:54:08,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 918 transitions. [2023-08-04 08:54:08,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 229.5) internal successors, (918), 4 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:54:08,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 476.0) internal successors, (2380), 5 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:54:08,133 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 476.0) internal successors, (2380), 5 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:54:08,134 INFO L175 Difference]: Start difference. First operand has 82 places, 79 transitions, 310 flow. Second operand 4 states and 918 transitions. [2023-08-04 08:54:08,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 132 transitions, 772 flow [2023-08-04 08:54:58,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 132 transitions, 762 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-04 08:54:58,235 INFO L231 Difference]: Finished difference. Result has 84 places, 80 transitions, 318 flow [2023-08-04 08:54:58,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=318, PETRI_PLACES=84, PETRI_TRANSITIONS=80} [2023-08-04 08:54:58,235 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 21 predicate places. [2023-08-04 08:54:58,235 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 80 transitions, 318 flow [2023-08-04 08:54:58,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 211.25) internal successors, (845), 4 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:54:58,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:54:58,236 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:54:58,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-04 08:54:58,236 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:54:58,236 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:54:58,236 INFO L85 PathProgramCache]: Analyzing trace with hash 177332707, now seen corresponding path program 1 times [2023-08-04 08:54:58,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:54:58,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311845480] [2023-08-04 08:54:58,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:54:58,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:54:58,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:54:58,294 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 08:54:58,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:54:58,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311845480] [2023-08-04 08:54:58,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311845480] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:54:58,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814147837] [2023-08-04 08:54:58,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:54:58,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:54:58,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:54:58,301 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:54:58,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-04 08:54:58,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:54:58,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:54:58,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:54:58,451 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 08:54:58,452 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:54:58,465 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 08:54:58,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814147837] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:54:58,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:54:58,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:54:58,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773290629] [2023-08-04 08:54:58,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:54:58,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:54:58,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:54:58,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:54:58,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:54:58,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 476 [2023-08-04 08:54:58,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 80 transitions, 318 flow. Second operand has 5 states, 5 states have (on average 210.4) internal successors, (1052), 5 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:54:58,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:54:58,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 476 [2023-08-04 08:54:58,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:55:40,930 INFO L124 PetriNetUnfolderBase]: 373606/488414 cut-off events. [2023-08-04 08:55:40,930 INFO L125 PetriNetUnfolderBase]: For 213254/213254 co-relation queries the response was YES. [2023-08-04 08:55:43,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1257871 conditions, 488414 events. 373606/488414 cut-off events. For 213254/213254 co-relation queries the response was YES. Maximal size of possible extension queue 6251. Compared 2984311 event pairs, 217864 based on Foata normal form. 1250/428751 useless extension candidates. Maximal degree in co-relation 1257837. Up to 414445 conditions per place. [2023-08-04 08:55:45,461 INFO L140 encePairwiseOnDemand]: 472/476 looper letters, 115 selfloop transitions, 3 changer transitions 1/125 dead transitions. [2023-08-04 08:55:45,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 125 transitions, 702 flow [2023-08-04 08:55:45,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:55:45,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:55:45,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 910 transitions. [2023-08-04 08:55:45,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47794117647058826 [2023-08-04 08:55:45,463 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 910 transitions. [2023-08-04 08:55:45,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 910 transitions. [2023-08-04 08:55:45,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:55:45,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 910 transitions. [2023-08-04 08:55:45,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 227.5) internal successors, (910), 4 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:55:45,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 476.0) internal successors, (2380), 5 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:55:45,466 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 476.0) internal successors, (2380), 5 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:55:45,466 INFO L175 Difference]: Start difference. First operand has 84 places, 80 transitions, 318 flow. Second operand 4 states and 910 transitions. [2023-08-04 08:55:45,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 125 transitions, 702 flow [2023-08-04 08:56:45,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 125 transitions, 688 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-04 08:56:45,201 INFO L231 Difference]: Finished difference. Result has 87 places, 80 transitions, 326 flow [2023-08-04 08:56:45,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=326, PETRI_PLACES=87, PETRI_TRANSITIONS=80} [2023-08-04 08:56:45,202 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 24 predicate places. [2023-08-04 08:56:45,202 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 80 transitions, 326 flow [2023-08-04 08:56:45,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 210.4) internal successors, (1052), 5 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:56:45,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:56:45,202 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:56:45,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-04 08:56:45,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-08-04 08:56:45,403 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:56:45,403 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:56:45,403 INFO L85 PathProgramCache]: Analyzing trace with hash 773183191, now seen corresponding path program 1 times [2023-08-04 08:56:45,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:56:45,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167041908] [2023-08-04 08:56:45,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:56:45,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:56:45,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:56:45,461 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-04 08:56:45,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:56:45,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167041908] [2023-08-04 08:56:45,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167041908] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:56:45,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435520417] [2023-08-04 08:56:45,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:56:45,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:56:45,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:56:45,463 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:56:45,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-04 08:56:45,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:56:45,609 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:56:45,611 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:56:45,621 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-04 08:56:45,621 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:56:45,633 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-04 08:56:45,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435520417] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:56:45,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:56:45,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:56:45,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301276036] [2023-08-04 08:56:45,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:56:45,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:56:45,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:56:45,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:56:45,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:56:45,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 476 [2023-08-04 08:56:45,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 80 transitions, 326 flow. Second operand has 5 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:56:45,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:56:45,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 476 [2023-08-04 08:56:45,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:57:09,324 INFO L124 PetriNetUnfolderBase]: 239821/315051 cut-off events. [2023-08-04 08:57:09,324 INFO L125 PetriNetUnfolderBase]: For 141950/141950 co-relation queries the response was YES. [2023-08-04 08:57:11,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 802864 conditions, 315051 events. 239821/315051 cut-off events. For 141950/141950 co-relation queries the response was YES. Maximal size of possible extension queue 3192. Compared 1839204 event pairs, 97144 based on Foata normal form. 4500/279594 useless extension candidates. Maximal degree in co-relation 802830. Up to 155123 conditions per place. [2023-08-04 08:57:12,177 INFO L140 encePairwiseOnDemand]: 472/476 looper letters, 122 selfloop transitions, 4 changer transitions 0/132 dead transitions. [2023-08-04 08:57:12,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 132 transitions, 743 flow [2023-08-04 08:57:12,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:57:12,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:57:12,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 917 transitions. [2023-08-04 08:57:12,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48161764705882354 [2023-08-04 08:57:12,179 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 917 transitions. [2023-08-04 08:57:12,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 917 transitions. [2023-08-04 08:57:12,179 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:57:12,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 917 transitions. [2023-08-04 08:57:12,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 229.25) internal successors, (917), 4 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:57:12,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 476.0) internal successors, (2380), 5 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:57:12,183 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 476.0) internal successors, (2380), 5 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:57:12,183 INFO L175 Difference]: Start difference. First operand has 87 places, 80 transitions, 326 flow. Second operand 4 states and 917 transitions. [2023-08-04 08:57:12,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 132 transitions, 743 flow [2023-08-04 08:57:23,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 132 transitions, 732 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 08:57:23,197 INFO L231 Difference]: Finished difference. Result has 89 places, 81 transitions, 336 flow [2023-08-04 08:57:23,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=336, PETRI_PLACES=89, PETRI_TRANSITIONS=81} [2023-08-04 08:57:23,197 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 26 predicate places. [2023-08-04 08:57:23,197 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 81 transitions, 336 flow [2023-08-04 08:57:23,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:57:23,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:57:23,198 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:57:23,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-04 08:57:23,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:57:23,399 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:57:23,399 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:57:23,399 INFO L85 PathProgramCache]: Analyzing trace with hash 884747619, now seen corresponding path program 1 times [2023-08-04 08:57:23,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:57:23,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964556707] [2023-08-04 08:57:23,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:57:23,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:57:23,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:57:23,463 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-08-04 08:57:23,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:57:23,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964556707] [2023-08-04 08:57:23,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964556707] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:57:23,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915032808] [2023-08-04 08:57:23,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:57:23,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:57:23,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:57:23,465 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:57:23,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-04 08:57:23,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:57:23,608 INFO L262 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:57:23,610 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:57:23,626 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-08-04 08:57:23,626 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:57:23,638 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-08-04 08:57:23,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915032808] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:57:23,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:57:23,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:57:23,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415695731] [2023-08-04 08:57:23,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:57:23,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:57:23,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:57:23,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:57:23,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:57:23,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 476 [2023-08-04 08:57:23,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 81 transitions, 336 flow. Second operand has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:57:23,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:57:23,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 476 [2023-08-04 08:57:23,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:57:48,196 INFO L124 PetriNetUnfolderBase]: 231407/303318 cut-off events. [2023-08-04 08:57:48,196 INFO L125 PetriNetUnfolderBase]: For 177629/177629 co-relation queries the response was YES. [2023-08-04 08:57:49,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 801101 conditions, 303318 events. 231407/303318 cut-off events. For 177629/177629 co-relation queries the response was YES. Maximal size of possible extension queue 3192. Compared 1755932 event pairs, 155147 based on Foata normal form. 1439/266140 useless extension candidates. Maximal degree in co-relation 801067. Up to 231221 conditions per place. [2023-08-04 08:57:50,841 INFO L140 encePairwiseOnDemand]: 472/476 looper letters, 123 selfloop transitions, 4 changer transitions 0/133 dead transitions. [2023-08-04 08:57:50,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 133 transitions, 754 flow [2023-08-04 08:57:50,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:57:50,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:57:50,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 917 transitions. [2023-08-04 08:57:50,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48161764705882354 [2023-08-04 08:57:50,843 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 917 transitions. [2023-08-04 08:57:50,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 917 transitions. [2023-08-04 08:57:50,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:57:50,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 917 transitions. [2023-08-04 08:57:50,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 229.25) internal successors, (917), 4 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:57:50,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 476.0) internal successors, (2380), 5 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:57:50,847 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 476.0) internal successors, (2380), 5 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:57:50,847 INFO L175 Difference]: Start difference. First operand has 89 places, 81 transitions, 336 flow. Second operand 4 states and 917 transitions. [2023-08-04 08:57:50,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 133 transitions, 754 flow Received shutdown request... [2023-08-04 08:57:58,680 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-04 08:57:58,681 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-04 08:57:59,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 [2023-08-04 08:57:59,696 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-08-04 08:58:02,886 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 08:58:02,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-04 08:58:02,887 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2023-08-04 08:58:02,887 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:58:02,887 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was TIMEOUT (1/2) [2023-08-04 08:58:02,888 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-04 08:58:02,888 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-04 08:58:02,891 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.08 08:58:02 BasicIcfg [2023-08-04 08:58:02,891 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-04 08:58:02,891 INFO L158 Benchmark]: Toolchain (without parser) took 674417.28ms. Allocated memory was 484.4MB in the beginning and 16.0GB in the end (delta: 15.5GB). Free memory was 432.8MB in the beginning and 12.9GB in the end (delta: -12.4GB). Peak memory consumption was 8.4GB. Max. memory is 16.0GB. [2023-08-04 08:58:02,892 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 348.1MB. Free memory was 299.0MB in the beginning and 298.9MB in the end (delta: 68.2kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 08:58:02,892 INFO L158 Benchmark]: CACSL2BoogieTranslator took 253.76ms. Allocated memory is still 484.4MB. Free memory was 432.5MB in the beginning and 420.3MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-04 08:58:02,892 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.11ms. Allocated memory is still 484.4MB. Free memory was 420.3MB in the beginning and 418.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 08:58:02,892 INFO L158 Benchmark]: Boogie Preprocessor took 28.41ms. Allocated memory is still 484.4MB. Free memory was 418.2MB in the beginning and 416.4MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 08:58:02,892 INFO L158 Benchmark]: RCFGBuilder took 611.65ms. Allocated memory is still 484.4MB. Free memory was 416.1MB in the beginning and 442.6MB in the end (delta: -26.5MB). Peak memory consumption was 26.1MB. Max. memory is 16.0GB. [2023-08-04 08:58:02,893 INFO L158 Benchmark]: TraceAbstraction took 673480.93ms. Allocated memory was 484.4MB in the beginning and 16.0GB in the end (delta: 15.5GB). Free memory was 442.0MB in the beginning and 12.9GB in the end (delta: -12.4GB). Peak memory consumption was 8.4GB. Max. memory is 16.0GB. [2023-08-04 08:58:02,894 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 348.1MB. Free memory was 299.0MB in the beginning and 298.9MB in the end (delta: 68.2kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 253.76ms. Allocated memory is still 484.4MB. Free memory was 432.5MB in the beginning and 420.3MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 35.11ms. Allocated memory is still 484.4MB. Free memory was 420.3MB in the beginning and 418.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 28.41ms. Allocated memory is still 484.4MB. Free memory was 418.2MB in the beginning and 416.4MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 611.65ms. Allocated memory is still 484.4MB. Free memory was 416.1MB in the beginning and 442.6MB in the end (delta: -26.5MB). Peak memory consumption was 26.1MB. Max. memory is 16.0GB. * TraceAbstraction took 673480.93ms. Allocated memory was 484.4MB in the beginning and 16.0GB in the end (delta: 15.5GB). Free memory was 442.0MB in the beginning and 12.9GB in the end (delta: -12.4GB). Peak memory consumption was 8.4GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 6.4s, 197 PlacesBefore, 44 PlacesAfterwards, 217 TransitionsBefore, 49 TransitionsAfterwards, 4842 CoEnabledTransitionPairs, 7 FixpointIterations, 85 TrivialSequentialCompositions, 62 ConcurrentSequentialCompositions, 25 TrivialYvCompositions, 17 ConcurrentYvCompositions, 15 ChoiceCompositions, 204 TotalNumberOfCompositions, 9825 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 8192, independent: 8093, independent conditional: 0, independent unconditional: 8093, dependent: 99, dependent conditional: 0, dependent unconditional: 99, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 2645, independent: 2624, independent conditional: 0, independent unconditional: 2624, dependent: 21, dependent conditional: 0, dependent unconditional: 21, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 8192, independent: 5469, independent conditional: 0, independent unconditional: 5469, dependent: 78, dependent conditional: 0, dependent unconditional: 78, unknown: 2645, unknown conditional: 0, unknown unconditional: 2645] , Statistics on independence cache: Total cache size (in pairs): 231, Positive cache size: 225, Positive conditional cache size: 0, Positive unconditional cache size: 225, Negative cache size: 6, Negative conditional cache size: 0, Negative unconditional cache size: 6, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5.9s, 197 PlacesBefore, 44 PlacesAfterwards, 217 TransitionsBefore, 49 TransitionsAfterwards, 4842 CoEnabledTransitionPairs, 8 FixpointIterations, 85 TrivialSequentialCompositions, 62 ConcurrentSequentialCompositions, 19 TrivialYvCompositions, 17 ConcurrentYvCompositions, 15 ChoiceCompositions, 198 TotalNumberOfCompositions, 10507 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 8718, independent: 8606, independent conditional: 0, independent unconditional: 8606, dependent: 112, dependent conditional: 0, dependent unconditional: 112, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 2640, independent: 2620, independent conditional: 0, independent unconditional: 2620, dependent: 20, dependent conditional: 0, dependent unconditional: 20, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 8718, independent: 5986, independent conditional: 0, independent unconditional: 5986, dependent: 92, dependent conditional: 0, dependent unconditional: 92, unknown: 2640, unknown conditional: 0, unknown unconditional: 2640] , Statistics on independence cache: Total cache size (in pairs): 221, Positive cache size: 215, Positive conditional cache size: 0, Positive unconditional cache size: 215, Negative cache size: 6, Negative conditional cache size: 0, Negative unconditional cache size: 6, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 7.4s, 229 PlacesBefore, 63 PlacesAfterwards, 256 TransitionsBefore, 73 TransitionsAfterwards, 12312 CoEnabledTransitionPairs, 8 FixpointIterations, 83 TrivialSequentialCompositions, 73 ConcurrentSequentialCompositions, 26 TrivialYvCompositions, 21 ConcurrentYvCompositions, 17 ChoiceCompositions, 220 TotalNumberOfCompositions, 34019 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 28143, independent: 27943, independent conditional: 0, independent unconditional: 27943, dependent: 200, dependent conditional: 0, dependent unconditional: 200, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 6717, independent: 6682, independent conditional: 0, independent unconditional: 6682, dependent: 35, dependent conditional: 0, dependent unconditional: 35, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 28143, independent: 21261, independent conditional: 0, independent unconditional: 21261, dependent: 165, dependent conditional: 0, dependent unconditional: 165, unknown: 6717, unknown conditional: 0, unknown unconditional: 6717] , Statistics on independence cache: Total cache size (in pairs): 679, Positive cache size: 669, Positive conditional cache size: 0, Positive unconditional cache size: 669, Negative cache size: 10, Negative conditional cache size: 0, Negative unconditional cache size: 10, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 115]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 217 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 11.8s, OverallIterations: 8, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 6.7s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 213 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 117 mSDsluCounter, 25 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 20 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 731 IncrementalHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 20 mSolverCounterUnsat, 25 mSDtfsCounter, 731 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 226 GetRequests, 202 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=154occurred in iteration=7, InterpolantAutomatonStates: 25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 340 NumberOfCodeBlocks, 340 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 361 ConstructedInterpolants, 0 QuantifiedInterpolants, 461 SizeOfPredicates, 4 NumberOfNonLiveVariables, 1339 ConjunctsInSsa, 18 ConjunctsInUnsatCore, 16 InterpolantComputations, 7 PerfectInterpolantSequences, 54/63 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 2 thread instances CFG has 10 procedures, 243 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 655.1s, OverallIterations: 16, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 642.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 7.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1162 SdHoareTripleChecker+Valid, 2.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 950 mSDsluCounter, 32 SdHoareTripleChecker+Invalid, 1.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 7 mSDsCounter, 54 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2943 IncrementalHoareTripleChecker+Invalid, 2997 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 54 mSolverCounterUnsat, 25 mSDtfsCounter, 2943 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 677 GetRequests, 625 SyntacticMatches, 10 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=336occurred in iteration=15, InterpolantAutomatonStates: 53, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 971 NumberOfCodeBlocks, 971 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 1184 ConstructedInterpolants, 0 QuantifiedInterpolants, 1604 SizeOfPredicates, 4 NumberOfNonLiveVariables, 2468 ConjunctsInSsa, 30 ConjunctsInUnsatCore, 32 InterpolantComputations, 11 PerfectInterpolantSequences, 350/371 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 7 procedures, 217 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 6.4s, OverallIterations: 2, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 29 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7 mSDsluCounter, 12 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 2 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 103 IncrementalHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2 mSolverCounterUnsat, 12 mSDtfsCounter, 103 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=140occurred in iteration=0, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 15 NumberOfCodeBlocks, 15 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 6 ConstructedInterpolants, 0 QuantifiedInterpolants, 12 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 2/2 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown